Influence of sea squirt (Halocynthia roretzi) aquaculture on benthic-pelagic coupling in coastal waters: A study of the South Sea in Korea

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• 作者：Jae Seong Lee^a ; ^{leejs@kordi.re.kr} ; Sung-Han Kim^b ; Yong-Tae Kim^c ; Sok Jin Hong^c ; Jeong Hee Han^d ; Jung-Ho Hyun^b ; Kyung-Hoon Shin^b
• 关键词：Halocynthia roretzi ; aquaculture ; feeding behavior ; benthic environment ; organic carbon ; benthic&ndash ; pelagic coupling
• 刊名：Estuarine ; Coastal and Shelf Science
• 出版年：2012
• 期刊代码：79_02727714
• 类别：env
• 出版时间：1 March, 2012
• 卷：99
• 期：Complete
• 页码：10-20
• 文件大小：885 K

摘要

The influence of sea squirt aquaculture on benthic-pelagic coupling was evaluated in semi-enclosed Korean coastal waters with an in situ benthic chamber and results show for the first time that suspended sea squirt cultures play an important role in benthic-pelagic coupling in the coastal zone. Measurements of primary production, vertical particulate fluxes, and benthic fluxes were made at two stations, a sea squirt (Halocynthia roretzi) farm (SSF) and an area of organic-matter-enriched sediment in Jinhae Bay. The vertical material fluxes of organic carbon, nitrogen, and biogenic silicate (BSi) were significantly higher at SSF than in Jinhae Bay, indicating massive biodeposits in the surface sediments at SSF. The organic carbon oxidation rates (C_ox) were estimated after correction for CaCO₃ dissolution. The average C_ox at SSF (204聽mmol聽C聽m^鈭?聽d^鈭?) was significantly higher than that in the organic-enriched Jinhae Bay sediment (77聽mmol聽C聽m^鈭?聽d^鈭?). The organic carbon burial fluxes were determined using vertical profiles of organic carbon of up to 30聽cm and the sedimentation rate calculated from the excess ²¹⁰Pb distribution. At both stations, 鈭?5%of the settled organic carbon was oxidized and only 鈭?%was buried in the deep sediment layer. The benthic fluxes of dissolved inorganic nitrogen and phosphate at SSF were 2-12 times higher than in Jinhae Bay, corresponding to 85%, and 270%, respectively, of the requirements for primary production.